Flask holder



FIG. 1 is a perspective view from the front and above of a flask holder according to my invention;

FIG. 2 is a further perspective view thereof, from the side and above;

FIG. 3 is a perspective view thereof, from the front and below;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is a side elevational view thereof, with the opposite side corresponding. 

The ornamental design for a flask holder, as shown and described. 